for two months from February every year, is an example. Disturbing feeding patterns Artificial feeding of wildlife by tourists can have severe consequences for social behavior patterns. Artificial feeding by tourists caused a breakdown of the territorial breeding system of land iguanas on the South Plaza in the Galápagos Islands. Territories were abandoned in favor of sites where food could be begged from tourists, and this has had a negative effect on the breeding success of iguanas. Artificial feeding can also result in a complete loss of normal feeding behaviors. In the Galápagos Islands, overfeeding by tourists was so extreme that, when stopped, some animals were unable to locate their natural food sources. Similarly, until the early 1970s, the diet of some grizzly bears in Yellowstone National Park consisted, to a large extent, of food wastes left by visitors at park refuse sites. When these sites were closed, the bears showed significant decreases in body size, reproductive rate, and litter size. Disruption of parent-offspring bonds Wildlife tourism also causes disruption to intra-specific relationships. Attendance by female harp seals to their pups declined when tourists were present and those females remaining with their pups spent significantly less time nursing and more time watching the tourists. There is also a risk of the young not being recognized, and being more exposed to predator attacks. A similar concern has been expressed over whale watching, whale calves normally maintain constant body contact with their mothers but, when separated, can transfer their attachment to the side of the boat. Increased vulnerability to predators and competitors The viewing of certain species by wildlife tourists makes the species more vulnerable to predators. Evidence of this phenomenon has been recorded in birds, reptiles and mammals. Problems have occurred in breeding colonies of pelicans . Increased mortality, vanity hunts, and poaching Vanity hunts (also called canned hunts) tend to breed their animals for specific desirable features without regard for the genetic health of the population. Breeding efforts can incorporate elements of inbreeding as specific features are aggressively sought. Inbreeding not only reinforces the presence of desirable features but brings with it the risk of inbreeding depression, which can reduce population fitness. Such operations also tend to feature other forms of animal abuse including inadequate housing and improper diet. Poaching, similarly to vanity hunting, selects strongly for animal phenotypes deemed desirable by hunters. This “harvest selection” (sometimes termed “unnatural selection”)